code: def get_histogram(hist_obj):
      """
      Parse input and convert to histogrammar object
  
      :param hist_obj: input histogrammar object. Can also be a corresponding json object or str.
      :return: histogrammar histogram
      """
      hist = None
      if isinstance(hist_obj, COMMON_HIST_TYPES):
          hist = hist_obj
      elif isinstance(hist_obj, str):
          hist = HG_FACTORY.fromJsonString(hist_obj)
      elif isinstance(hist_obj, dict):
          hist = HG_FACTORY.fromJson(hist_obj)
      if hist is None:
          raise ValueError("Please provide histogram object as input.")
      return hist
  
file_path: popmon/popmon/hist/hist_utils.py
imports: import histogrammar
  import histogrammar.specialized
  import numpy
  import pandas
  from histogrammar.specialized import CategorizeHistogramMethods, HistogramMethods, SparselyHistogramMethods, SparselyTwoDimensionallyHistogramMethods, TwoDimensionallyHistogramMethods
  from histogrammar.util import get_hist_props
label_desc: Use image node_id 5 for calling a global function with example usage: get_histogram(hist_obj) and returns: hist